Abstract: Gas explosion′s influence analyzing on plant layout was divided into three steps, which were flammable gas scope confirmation, explosion energy confirmation and distance confirmation for different units. Considering both the maneuverability and creditability of the system, appropriate methods were proposed for the three steps: suitable empirical gas dispersion models for flammable gas scope confirmation; TNO multi-energy model for explosion energy confirmation; shock wave′s different harm classes on people and facility were chosen as performance-based targets for distance confirmation between different units. With ALOHA as the gas dispersion computation tool, a plant layout design drawing of a methanol decomposing hydrogen factory in Nanjing was taken as an example to demonstrate the flow, from which the disadvantages of the design drawing are brought forward, and a new plant layout design drawing is put forward, and the feasibility of the flow is thereby validated.

Key words: Plant layout  , Gas explosion   ,   ,  Multi-energy method , Performance-based target

摘要： 将气云爆炸对厂区平面布局的影响分析分为可燃气云范围确定、爆炸能量确定以及单元间距离确定
33个研究步骤,综合考虑系统的易操作性和准确性,分别给出了各步骤恰当的操作方法,即以合适的扩散经验模型
作为可燃气云范围确定的方法;以TNO 多能法作为气云爆炸能量确定的方法;以冲击波对人员及设备的伤害等级
为性能化目标作为单元间距离确定的依据。以南京某甲醇裂解制氢厂家为例,选择ALOHA 作为扩散计算工具,按
照流程对厂区的气云爆炸后果进行了分析,指出了现有平面布局的不足之处,并以之为依据给出了新的平面布局设
计图,说明了系统的可行性。

关键词: 平面布局   ,   , 气云爆炸  ,   , 多能法  ,   , 性能化目标